4-Hydroxy Omeprazole Sulfide;2-[(6-methoxy-1H-benzimidazol-2-yl)sulfanylmethyl]-3,5-dimethyl-1H-pyridin-4-one;Omeprazole Pyridone;PYR331;EsoMeprazole related substance;2-[[(6-Methoxy-1H-benziMidazol-2-yl)thio]Methyl]-3,5-diMethyl-4-pyridinol;2-[[(5-Methoxy-1H-benziMidazol-2-yl)thio]Methyl]-3,5-diMethyl-4-pyridinol;EsoMeprazole H215;ESOMEPRAZOLE RELATED SUBSTANCEH215